SNT401-53 S1 Yokogawa Optical Repeater Module

SNT401-53 S1 Yokogawa Optical Repeater Module | New & Original Stock

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Yokogawa SNT401-53 S1 Optical ESB Bus Repeater Module Configured for high-speed bus extension in CENTUM VP / CS 3000 FIO...

SKU: SNT401-53

Manufacturer: Yokogawa
Product No.: SNT401-53
Product Type: Bus Interface Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 300g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa SNT401-53 S1 Optical ESB Bus Repeater Module

Configured for high-speed bus extension in CENTUM VP / CS 3000 FIO subsystems, the Yokogawa SNT401-53 S1 (Yokogawa SNT401 Optical ESB Bus Repeater Module) provides direct physical/electrical execution.

Hardware Specifications

Parameter	Specification
Model	SNT401-53 S1
Brand	Yokogawa
Origin	Japan
Weight	0.3 kg
Dimensions	2.2 cm x 12.4 cm x 12.6 cm
Operating Temp	-20 to +70 deg C
Power Consumption	0.5 A baseline (5 VDC: ~1.0 A / 24 VDC: ~50 mA through baseplate)
Core Function	Converts ESB bus signals to optical signals
Network Topology	Supports star and chain type connections
Maximum Distance	5 km standard (10 km with R1.03 or later Vnet/IP system)
Max Connecting Stages	2 stages
Corrosion Protection	ISA Standard G3 conformal coating
Isolation	Optical isolation between FCS communication and I/O bus

Process Control and DCS Optical Bus Management

The communication module interfaces with the Field Control Station (FCS) backplane to convert electrical ESB signals into optical propagation sequences. It governs real-time I/O scanning and data buffering across distant nodes while maintaining complete channel-to-channel isolation through its native fiber-optic media. Operating within a 4-20 mA HART loop protocol architecture, the card isolates core processor logic from field-side surge potentials. The module implements strict signal timing to suppress transmission delays across star or chain topologies, preserving deterministic data synchronization independent of local system firmware flash versions.

Frequently Asked Questions

Q: What are the backplane current constraints when deploying the SNT401-53 S1 in a redundant node configuration?

A: The module draws approximately 1.0 A at 5 VDC and 50 mA at 24 VDC from the FIO baseplate power rail. Engineers must confirm that the total current load of the dual repeater modules does not exceed the hardware limits of the localized node power supply units.

Q: How does the optical interface handle line faults or connection breaks during active DCS operations?

A: In a redundant dual-line configuration, the internal logic monitors link status using built-in diagnostics. If an optical signal drops or a cable breaks, the module executes an automatic switchover to the secondary redundant path without disrupting the running process control logic.

Field Installation Guidelines

Baseplate Slot Alignment and Locking: Insert the module firmly into the designated slot of the FIO baseplate. Push the card straight along the guide rails until the rear interface seats completely into the backplane connectors, then lock the mechanical latches.
Optical Fiber Routing and Bend Radii: Route all fiber-optic cables through protective low-noise conduits separated from high-voltage AC cables and motor drive lines. Maintain the manufacturer-specified minimum bend radius to prevent signal attenuation and data tracking dropouts.
Environmental Enclosure Considerations: Verify that the industrial cabinet installation maintains the ISA G3 conformal coating parameters by sealing unused openings. Keep the ambient operational boundary between -20 and +70 deg C to guarantee long-term stability under continuous thermal loads.

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